bitesize - Summarize block device I/O size as a histogram - Linux eBPF/bcc.
Show I/O distribution for requested block sizes, by process name.
This works by tracing block I/O kernel functions using dynamic tracing and
prints a historgram of I/O size.
Since this uses BPF, only the root user can use this tool.
CONFIG_BPF and bcc.
- Count I/O size per process until Ctrl-C is hit:
- # bitesize
- Size in kilobytes of range
- How many I/O fell into this range
- An ASCII bar chart to visualize the distribution (count
This traces kernel block I/O functions to update a histgroam, which are
asynchronously copied to user-space. This method is very efficient, and the
overhead for most storage I/O rates (< 10k IOPS) should be negligible. If
you have a higher IOPS storage environment, test and quantify the overhead
This is from bcc.
Also look in the bcc distribution for a companion _examples.txt file containing
example usage, output, and commentary for this tool.
Unstable - in development.